One question: Why can’t on-chain transfers be reversed?
While a transaction is still waiting to be included in a block in the mempool, some wallets offer an “accelerate” button, which broadcasts a replacement transaction with a higher fee. It may not work.
When withdrawing from an exchange, once the withdrawal request has been sent to the blockchain, the platform can’t reverse it either. It can only be canceled while it’s still under review.
Anyone claiming they can help recover coins you’ve already transferred and asking for an upfront fee is almost certainly a scammer.
Back to the market: $BTC is at 73750, down 1.45% over 24h.

DYOR, and only invest what you can afford.